Biplots displaying the first three axes of the PCA of the environmental variables of the lakes sampled in 2014 and 2016 (A PC1-2 B PC1-3). The colours refer to the different lake groups: orange circles (I), green triangles (II) and blue squares (III). The lengths of the arrows are proportional to the loading of each variable, dashed lines = 0. The acronyms of lakes are according to Fig. 1 and Suppl. material 1.

  Part of: Podwysocki K, Desiderato A, Mamos T, Rewicz T, Grabowski M, Konopacka A, BÄ…cela-Spychalska K (2024) Recent invasion of Ponto-Caspian amphipods in the Masurian Lakeland associated with human leisure activities. NeoBiota 90: 161-192.